Cant set target to 32 bit

Hi,

I'm new to SharpDevelop - having just moved over from Visual Studio.

I've opened by c# project (created in VS) and tried to compile it, but got the error 

64 bit debugging is not supported please set project target CPU to 32bit.

So I've set target CPU to '32 bit intel compatible processor in the projects properties, I've done this for release and debug

But when I try to debug I get the error again.

I can't see what else there is to set.

Any advise would be great!

Thanks.